Flaveria campestris

J. R. Johnston

Proc. Amer. Acad. Arts 39: 287. 1903.

Common names: Alkali yellowtops
IllustratedEndemic
Treatment appears in FNA Volume 21. Treatment on page 250. Mentioned on page 247, 248.
Revision as of 21:01, 27 May 2020 by imported>Volume Importer

Annuals, 18–70(–90) cm (delicate or robust, mostly glabrous). Stems usually erect (tufted-pubescent at nodes). Leaves sessile; bladeslinear-lanceolate to lanceolate, 30–90 × 6–22 mm, bases barely connate, margins strongly to weakly serrate or spinulose-serrate. heads (10–)15–100+, in tight subglomerules in corymbiform arrays. calyculi of 2 linear-lanceolate bractlets 1–3 mm. involucres urceolate or oblong, 6–7 mm. phyllaries 3, elliptic, obovate, or oblong-obovate. ray florets 0 or 1, laminae yellow, ovate, 1.5–2.5 mm (apices notched). Disc florets 5–6(–8);, corolla tubes 0.8–1.3 mm, throats funnelform, 1.2–1.7 mm. Cypselae oblanceolate, linear, or oblong, 2.8–3.6 mm (those of rays longer by ca. 0.2 mm), pappi 0. 2n = 36 (18).


Phenology: Flowering May–Nov.
Habitat: Saline soils, lake, pond, stream margins, flood plains, and disturbed pastures
Elevation: 1000–1800 m

Distribution

V21-618-distribution-map.gif

Ariz., Colo., Kans., Mo., N.Mex., Okla., Tex., Utah.

Discussion

Flaveria campestris is distinguished by subglomerulate capitulescences with 5–6(–8) florets per head, subtended by 3 leafy bracts, keeled phyllaries, and linear-lanceolate leaves with serrate or spinulose-serrate margins, and its distribution. The prevalence of F. campestris fluctuates greatly from year to year, generally depending on the existence of wet, saline habitat.

Selected References

None.

Lower Taxa

None.
... more about "Flaveria campestris"
Sharon C. Yarborough +  and A. Michael Powell +
J. R. Johnston +
Alkali yellowtops +
Ariz. +, Colo. +, Kans. +, Mo. +, N.Mex. +, Okla. +, Tex. +  and Utah. +
1000–1800 m +
Saline soils, lake, pond, stream margins, flood plains, and disturbed pastures +
Flowering May–Nov. +
Proc. Amer. Acad. Arts +
Illustrated +  and Endemic +
Compositae +
Flaveria campestris +
Flaveria +
species +